In Poolmath you select Boric acid and it will tell you how much to add to achieve the level you wish.
Added 80 oz LC, which according to pool math should have brought me to 5ppm. Tested half hour later, test shows 2.4ppm. So either weak chlorine, or I did not test my CYA correctly, or a combination of both? I feel pretty confident about my CYA test showing 40, and it concurred with the pool store analysis of 39ppm. So seems weak bleach for starters, by 50%. Do you think I also think I need to SLAM, because of the recurring mustard algae?Add 5 ppm worth of liquid chlorine. Circulate pool for 30 minutes. Test FC. Sounds to me the liquid chlorine is weak.